Definition
A specialization of InanimateObject_Natural. The collection of all things of the types studied by astronomers. Each instance of AstronomicalObject is a (usually quite large) natural, inanimate object that is located in the physical universe and is not on the surface of the Earth. (But note that PlanetEarth itself
is an instance of this collection.) An
AstronomicalObject might be either an individual heavenly body (see
AstronomicalBody) or a group or system made up of such bodies (see e.g.
Galaxy and PlanetarySystem). See also the specialization
CelestialObject, instances of which are visible from the Earth.
